摘要
采用基于排气与压缩上止点的两次燃油喷射进行了柴油p-HCCI(partial-HCCI)燃烧的研究,分析了首次喷射油量和2次喷射油量对p-HCCI燃烧的燃烧与排放特性的影响,并兼顾排放和经济性确定了首次喷射比例。结果表明:首次喷射与2次喷射对燃烧过程的影响不同,随着首次喷射燃油量的增加,燃烧相位明显提前,而随2次喷射比例的增加,燃烧放热率峰值增大;首次喷射和2次喷射对NOx排放的影响相同,NOx排放随着喷射量的增加而增加,而2次喷射量的增加容易造成碳烟排放的增加。通过优化首次喷射比例,可以维持在发动机指示热效率不变的情况下,降低NOx和碳烟排放。
The diesel-fuelled p-HCCI combustion is studied using two-stage fuel injection at the exhaust TDC and the compression TDC.The effects of fuel quantity in the first injection and the second injection on the combustion and emission performances were studied.The optimized ratio of first fuel injection is decided by the tradeoff of emissions and economy.Different effects from each injection in the two-stage injection on the combustion process are demonstrated.Increasing the quantity of the first injection advan...
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2008年第6期481-486,共6页
Transactions of Csice
基金
国家重点基础研究发展规划资助项目(2007CB210003)
